Anatomy of a Domain Name

ex) www.google.com = FQDN (Fully qualified domain name)

.com = TLD google = domain www. = sub-domain or host-name

ICANN - Internet Corporation for Assigned Names and Numbers

• sister organization to the IANA
• together, they help define and control both of the global IP spaces along with the global DNS system

Domains - used to demarcate where control moves from a TLD name server to an authoritative name server

www.google.com = FQDN (Fully qualified domain name)

• DNS can technically support up to 127 levels of domain in total for a single fully qualified domain name